Cecile (Ceil) Wendt Jensen is a Certified Genealogist and owner of Michigan Polonia. Author, educator, and researcher, Cecile is a native of Detroit, and a board member of Polish Genealogical Society of Michigan serving as their representative to the Federation of Genealogical Societies. Ceil is a graduate of Michigan State University in East Lansing and spent thirty years in K-12 education where she pioneered multimedia technology integration in the classroom.

In 1998, Ceil began a transition from public education to genealogy and has become a featured international speaker. She has conducted research in Poland at libraries, civil archives, diocesan archives, and in local parishes. Her published articles have appeared in National Genealogical Societies Magazine, Ancestry Magazine, FEEFHS Journal, Polish Genealogical Society of Michigan's Polish Eaglet, and online with Gen Dobry.

Arcadia Publishing has released three titles by Ceil: Detroit’s Polonia (2005) Detroit’s Mount Elliott Cemetery (2006), and Detroit’s Mount Olivet Cemetery (2006). She collaborated on the DVD Our Polish Story (2007).She is the 2008 recipient of the Michigan Genealogical Council 's Lucy Mary Kellogg Award and The MTU Archives and Copper Country Historical Collections 2008 Research Travel Award.